Marshall Jefferson (born September 19, 1959, Chicago, Illinois) is an American musician, working in house music, in particular, the subgenres of Chicago house and deep house. Jefferson was originally a record producer in the Universal Recording Studios in Chicago, where he met the owner of Trax Records, Larry Sherman. Jefferson's 1986 single for Trax, "Move Your Body (The House-Music Anthem)," the first house song to use piano, was a popular and influential song in the genre. During the late-1980s heyday of...